Steam-shovel.



E. J. MOYNIHAN.

STEAM SHUVEL.

APPLICATION FILED APR 12, I916.

nvvew 70/? E. .1. MD YNINAA' Patented Dec. 26, 1915.

the nra w-isity of operating the dipper in manner and thereby to cheat a great saving UNITED STATES EUGENE J. MOYNIHAN, OF SAN FRANCISCO,

PATENT OFFICE.

CALIFORNIA.

. 'srEaM-sHovnL.

To all whom it may concern:

Be it known thatl, Euonxu J. Mormnan, a citizen of the United States, residing at San Francisco, in the county 0 San Francisco and State of California, have invented new and useful Improvements in Steam-Slmvels, of which the following is a specification v The present invention relates to improve inrnts in steam shovelsand the like It is a matter of common experience with operators of steam shovels that much time is wasted in operating the dipper to pick up loose material lying on the ground at the same height as, or lower than, the track on which the steam shovel is movable. The operator has, with the present construction of steam-shovel, to draw the dipper back over the loose anaterial and then, lowering ,the dipper, adrance'it over said material several times in order to cause the material to enter the dipper.

My inventmn has for its object to avoid this oftime.

1 have I i-rein shown my improvement as applirl to'a liiieyru team shoveh'hut it to he weltunderstood that with suitable (Illrious changes, it may equally well he applied to auv form of steam shovel.

in the accompanyingdrawing, Figure l is a side elevation of a portion 0 a steam shovel showing my invention applied thereto; F ig. 2 is a plan view of a portion thereof, especially showing my invention; Fig. 3 is an enlarged sectional view on the line 3-3 of Fig. 2.

Referring to the drawing, 1 indicates the frame and 2 the front truck of a steam shovel, to which my invention is shown as applied.

3 indicates the boom a d 4 the dipper handle, pivoted upon a ing thereon shipper shaft gear wheels 7.

8 indicates the dipper pivotaily carried upon the end of the dipper handle, and 9 a hoisting chain or'cahle, passin' around pulleys 11, 12, and wound upon a hoisting drum 13 having a hoisting gear whee All of. the above is old and in common use and forms no part of my present invention.

Bolted, as shown at 16, to themar body are uprights 17, 18, carrying boxes 19, 20 for a rotary shaft-21. aid shaft has so cured thereon agcar wheel, 22 which con- Application filed April 12, 1816.

' tinually meshes with shipper shaft-6, lmv-1 Specification of Letters Patent.

Patented Dec. 26, 1916.

Serial No. 96,624.

the hoisting gear wheel 1-1. Said gear wheel 22 is formed on one side with a rib 23 coaxial with the shaft 21 and angular in crossseetion, to maize frie tional engagen'ient with the sides of an an mlar groove 2% formed'i-in the side of n t ange 26 of a winding drum 2'? loos-con said shaft 21. Said winding drum 2? is inorable longitudinally on said shaft toward said gear wheel 22 by means of a lever 25 on a shaft 1.50 on whirh'is an arm 15, shown in dotted lines in Fig. 1, eonnected to one end of a linl: 6 connected toa lever 2b serured to the outer end of into a block ill in line with the center oi ,the shaft ll, said bloch' being secured. ak shown at 32. to the upright 1h. liXttlllllllfl in'arentr-al, hole of the shaft .21 is a pin 3 .5, which, at the outer end, is engaged by the forward end of the threaded rod, while its inner end engages a slide bur 2-H extending tlilllSVGl'fiil) through diametrically opposite Hots ihiin'thehollow shaft and retained in sui'hyposition by means of ottersB? through its opposite enr s. This slide bar engages the fare of a huh 38 formed at the end of the drum 2T reniote from the gear wheel.

ll): turning the lever 28 in the proper direction, the groored flange 26 of the drum 2'? is forced against the annular rib 23 on the face of the gear wheel, and by the frictional engagement of said flange and rib the drum is ruu'sed to rotate with the gear wheel. he drum 2? can be arrested immediately by the operation of a foot brake *0.

Around the drum is wound a cable 39 which extends around guide pulleys ll and 4-2, and then over a pulley 43, the outer end of said cable being attachedto a snap hook 44 which is a'tt ached to a loop tached to a cable 40 which extends around a pulley 47 suspended from the dip )er handie and is then fastened with a \ishaped bolt ,fi tothebottom.oijthe, door t?) .of the dipper. "There 'is'also attiieh'edtothe loop &5 one end of a coiled spring 5 1 surrounding the cable 46, the other end of said ooiled spring being attached, as shown at 47, to a stationary oint on the dipper handle. The object of t \o coiled sprin r 51 is to take up the slack when the cab e 39 is unwound from the drum. The alley 43 is formed like a snatch block, so tint the cableflfi can be withdrawn thcref 'oin an extend direct between the pulley 42 and the spring 51, for heavy work.

a threaded rod 29 screwed 45 which is at- I whereupon the There is secured to the end of tlie"dipper handle a gnideway 52 for a spring-actuated latrh 5 the forward end of said latch be? he; adapted to he engaged by a wedge; shaped projection 54.- on the door of the digper when said door swings open and to e reaseil back against the spring until 'said projection has Missed the end of the-latch,

latch springs'forward underthe pressure of said springand holdssaid lippvr door in the open position. The outer. end of said latch 53 is attached by a chain M; to the dumping lever 57 which is part of the present machine. i m,

The following the operution of myin} vont-ionr''lh e (appellate raisedhby means of the main hoisting drum'13 winding up the hoisting line or chain 9. After the dip per door has beenopened by pulling hthe; dumping lover and releasing thedatehlbeif; in the usualmanner for the purpose; of

(lumping-the material in the dipper wfizio tion is; thrown oil the main hoistlnglditum Ming s,

.by-lahr footm which is then only'controlled:

, ln-alcr, :inrl the dipper deseendsuveith the than" open. Asit descends the'dr-umfli winds up the cable 39, this druIn being in friutional engagement with the ealhwheelg 22 and therefore driven by the e dipper thus descends to the ground with the door wide open. The operator then causes the dipper to move on the round in-aebacl -fl \vanl direction by suitably operatingthel; homn engine and drawing'baelr therablef; attached to the'bottom of the door'byme'ansa of the' main engine at the same time r0 t'ating the drum 27, and windingu'p the; czlllll' It), so as to maintain said dooropen and it may be observed that the'tension on the rahle 3!), after pulling the doorewide; l open; assists in drawing back the dipper. A liv this harkward movement the'greateif a part of the loose material.- is caused to enter the dipper. 'ln prior devices it has been:

necessary, in order to secure the entrancelofz-l this: loose material into the dipper, tomau'sea; the dipper to travel backward a ove the mal'i-ria] and then forward"tgalin'dn: u lower amithm througlrthe material, a great-many;

mw dia itaire i wo athq'ini a appai ntae of; the eliarae giue. il he hy the do or w be released .from the hiteh 53, and can be lowerediby iii'eans oflthe ea hle 39 controlled by the drain 21 "The u'saiilholt 57 upon the back of the c loor di'hps into the hole 58 thereforl w: I- claim;

1,, lnieoinbination'f'wi th'tlie dipper of an apparatus of the h alii t ter'jdeseribed having adooni if oleeing'tliebottbil'f of the dipper, p'e' ra'tetl from the frame tiswl'ieibythe door of -the ;dipper. n1a} ho 'josi tively held open whmrthe dipper is"ol c' s"to the ground, and wherein "the, liuel ietffiay' be drawn rearwen ti lwi m ll li l [ra flaw 0f t h'h des'oribed havdoor tor, elos iiig :tlief 'bottom of the d pper g e h s the frame work f. i ,f;1 "aqapa'g vherb the door of ay held open when the dipper is.eloseftojt ef gronnd and a spring aet i atel l toh tfljlpted to be engaged ieir sji'ing wide open to wane do a he 0 "e a a 3. In corrihination wi tl' 'thddipper of an apparatus, 0ft the ch ifitolei" described havdoor for eloeihQ-gthe bottom of the d pi. a ,a....!-%ai .e 'etflilfip the frame work-oflthe apparzit is wheiiehy the door of the dippen imy'po sitiyfelyi held open when the: dippe 1;., is close to 'Jth'e" round, means tie door when swinging wide 1 open to [hold automatically .engi1g'ed the door in the .open position, and In'een'sffor releasing said automatically engagetl neans;

Intesti nony wl ereof I have hereunto set my hand in theljp je'sechee of two subscribing wane-Sm "9" EUGENEwJnMGYNIHAN.

Witnesses r? Ween ND: 1 BL HNF E' 

